treemapUpdate is package {
  private import treemap

  main () do {
    tm0 is _set_indexed(trEmpty, "b", 3)
    logMsg(info,"tm0=$(__display(tm0))");

    tm1 is _set_indexed(_set_indexed(tm0, "t", 3), "m", 3)
    logMsg(info,"tm1=$(__display(tm1))");

    tm2 is _set_indexed(tm0, "b", 5)
    logMsg(info,"tm2=$(__display(tm2))");
    tm3 is _set_indexed(tm1, "b", 5)
    logMsg(info,"tm3=$(__display(tm3))");

    logMsg(info, "tm0[b] = $(tm0["b"])");
    logMsg(info, "tm1[b] = $(tm1["b"])");
    logMsg(info, "--------")
    logMsg(info, "tm2[b] = $(tm2["b"])");
    logMsg(info, "tm3[b] = $(tm3["b"])"); 
  }

}